Multiplacophora
Multiplacophora is a stem-group of chitons with a number of plates arranged in 7 rows along the body. They date to at least the Upper Cambrian, but two lower Cambrian fossils- Ocruranus and Trachyplax - may extend the range downwards.- Family Hercolepadidae Dzik, 1986
- * Genus Hercolepas Aurivillius, 1892
- * Genus Protobalanus Hall and Clarke, 1888
- Family Strobilepidae Hoare and Mapes, 1995
- * Genus Aenigmatectus Hoare and Mapes, 1996
- * Genus Deltaplax Puchalski, Johnson, Kauffman and Eernisse, 2009
- * Genus Diadeloplax Hoare and Mapes, 1995
- * Genus Hannestheronia Vinther, Jell, Kampouris, Carney, Racicot & Briggs, 2012
- * Genus Polysacos Vendrasco, Wood and Runnegar, 2004
- * Genus Strobilepis Clarke in Hall and Clarke, 1888
